Method of producing novolak resin

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 6936680
APP PUB NO 20020091224A1
SERIAL NO

10000364

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Abstract

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Provided an industrially excellent method of producing a phenol novolak resin having an ortho ratio of 30% or more by: (1) a method of reacting a phenol and an aldehyde using an oxalic acid catalyst at 110 to 160° C. under pressure; or (2) a method of reacting a phenol and an aldehyde under pressure while removing the heat of reaction by a condenser with controlling a pressure so that water or an organic solvent present in the reaction system is refluxed.

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Patent Owner(s)

Patent OwnerAddress
CHANG CHUN PLASTICS CO LTD7F NO 301 SONGJIANG RD TAIPEI

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Aizu, Ichishi Niihama, JP 2 6
Fujiwara, Masahiro Niihama, JP 74 530
Nakajima, Nobuyuki Niihama, JP 108 1079
Saito, Noriaki Toyonaka, JP 109 829
Yano, Koji Niihama, JP 153 806

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